Genetic Variant BRAF:p.Gly32_Ala33dup (chr7-140924603-G-GCGGCGC) – ACMG Classification: Benign (-10 pts)

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP3BP6BS1BS2

The NM_004333.6(BRAF):c.95_100dupGCGCCG(p.Gly32_Ala33dup) variant causes a conservative inframe insertion change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000177 in 1,528,868 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. A34A) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00028 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00016 ( 0 hom. )

Consequence

BRAF
NM_004333.6 conservative_inframe_insertion

Scores

Not classified

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:6

Conservation

PhyloP100: 0.0760

Publications

1 publications found

Variant links:

Genes affected

BRAF (HGNC:1097): (B-Raf proto-oncogene, serine/threonine kinase) This gene encodes a protein belonging to the RAF family of serine/threonine protein kinases. This protein plays a role in regulating the MAP kinase/ERK signaling pathway, which affects cell division, differentiation, and secretion. Mutations in this gene, most commonly the V600E mutation, are the most frequently identified cancer-causing mutations in melanoma, and have been identified in various other cancers as well, including non-Hodgkin lymphoma, colorectal cancer, thyroid carcinoma, non-small cell lung carcinoma, hairy cell leukemia and adenocarcinoma of lung. Mutations in this gene are also associated with cardiofaciocutaneous, Noonan, and Costello syndromes, which exhibit overlapping phenotypes. A pseudogene of this gene has been identified on the X chromosome. [provided by RefSeq, Aug 2017]

BRAF Gene-Disease associations (from GenCC):

cardiofaciocutaneous syndrome
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
cardiofaciocutaneous syndrome 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
LEOPARD syndrome 3
Inheritance: AD Classification: DEFINITIVE, STRONG, LIMITED Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
Noonan syndrome 7
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Genomics England PanelApp, Ambry Genetics
Noonan syndrome
Inheritance: AD Classification: MODERATE Submitted by: ClinGen
Noonan syndrome with multiple lentigines
Inheritance: AD Classification: SUPPORTIVE, LIMITED Submitted by: ClinGen, Orphanet
anaplastic astrocytoma
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
Costello syndrome
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
Noonan syndrome-like disorder with loose anagen hair
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

BRAF links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -10 ACMG points.

BP3

Nonframeshift variant in repetitive region in NM_004333.6

BP6

Variant 7-140924603-G-GCGGCGC is Benign according to our data. Variant chr7-140924603-G-GCGGCGC is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 41448.

BS1

Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.000284 (43/151504) while in subpopulation EAS AF = 0.000595 (3/5042). AF 95% confidence interval is 0.000242. There are 0 homozygotes in GnomAd4. There are 18 alleles in the male GnomAd4 subpopulation. Median coverage is 31. This position passed quality control check.

BS2

High AC in GnomAd4 at 43 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004333.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
BRAF	NM_001374258.1	MANE Plus Clinical	c.95_100dupGCGCCG	p.Gly32_Ala33dup	conservative_inframe_insertion	Exon 1 of 20	NP_001361187.1	A0A2R8Y8E0
BRAF	NM_004333.6	MANE Select	c.95_100dupGCGCCG	p.Gly32_Ala33dup	conservative_inframe_insertion	Exon 1 of 18	NP_004324.2
BRAF	NM_001374244.1		c.95_100dupGCGCCG	p.Gly32_Ala33dup	conservative_inframe_insertion	Exon 1 of 19	NP_001361173.1	A0A2U3TZI2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
BRAF	ENST00000644969.2	MANE Plus Clinical	c.95_100dupGCGCCG	p.Gly32_Ala33dup	conservative_inframe_insertion	Exon 1 of 20	ENSP00000496776.1	A0A2R8Y8E0
BRAF	ENST00000646891.2	MANE Select	c.95_100dupGCGCCG	p.Gly32_Ala33dup	conservative_inframe_insertion	Exon 1 of 18	ENSP00000493543.1	P15056
BRAF	ENST00000288602.11	TSL:1	c.95_100dupGCGCCG	p.Gly32_Ala33dup	conservative_inframe_insertion	Exon 1 of 19	ENSP00000288602.7	A0A2U3TZI2

Frequencies

GnomAD3 genomes

AF:

0.000284

AC:

AN:

151504

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000387

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000656

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000595

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000339

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000792

AC:

AN:

126314

AF XY:

0.0000578

show subpopulations

Gnomad AFR exome

AF:

0.000173

Gnomad AMR exome

AF:

0.0000415

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000978

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000856

Gnomad OTH exome

AF:

0.000510

GnomAD4 exome

AF:

0.000165

AC:

227

AN:

1377364

Hom.:

Cov.:

AF XY:

0.000160

AC XY:

109

AN XY:

679562

show subpopulations

African (AFR)

AF:

0.0000965

AC:

AN:

31090

American (AMR)

AF:

0.000142

AC:

AN:

35332

Ashkenazi Jewish (ASJ)

AF:

0.0000400

AC:

AN:

25012

East Asian (EAS)

AF:

0.000197

AC:

AN:

35514

South Asian (SAS)

AF:

0.0000760

AC:

AN:

78980

European-Finnish (FIN)

AF:

0.0000299

AC:

AN:

33402

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4150

European-Non Finnish (NFE)

AF:

0.000188

AC:

202

AN:

1076458

Other (OTH)

AF:

0.0000348

AC:

AN:

57426

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.431

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000284

AC:

AN:

151504

Hom.:

Cov.:

AF XY:

0.000243

AC XY:

AN XY:

73984

show subpopulations

African (AFR)

AF:

0.000387

AC:

AN:

41304

American (AMR)

AF:

0.0000656

AC:

AN:

15248

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.000595

AC:

AN:

5042

South Asian (SAS)

AF:

0.00

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10540

Middle Eastern (MID)

AF:

0.00

AC:

AN:

312

European-Non Finnish (NFE)

AF:

0.000339

AC:

AN:

67770

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.449

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000146

Hom.:

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (2)

not specified (2)

BRAF-related disorder (1)

Cardiovascular phenotype (1)

Noonan syndrome (1)

Noonan syndrome and Noonan-related syndrome (1)

RASopathy (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

PhyloP100

0.076

Mutation Taster

=76/24

polymorphism

(source)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over